基于改进下垂控制的微电网运行控制研究
微电网中,采用下垂控制的微电源,线路阻抗差异、输出电压幅值不等以及微电网复杂结构等因素均会导致微电源输出无功功率不能达到均分的效果,使微电源间出现无功环流。为解决这一问题,提出了一种改进的下垂控制策略。即在传统无功下垂控制中加入线路压降和微电源接入点电压幅值反馈量作为无功下垂控制的补偿量,有效跟踪微电网电压变化,改善输出电压幅值不等的状况。在Matlab/Simlink中搭建微电网仿真模型。仿真结果表明,改善的下垂控制能够大大提高无功均分的分配精度,提高微电网的系统稳定性。...
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| Published in | 电力系统保护与控制 Vol. 44; no. 4; pp. 16 - 21 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
上海电机学院,上海,201306
2016
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| Subjects | |
| Online Access | Get full text |
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| Abstract | 微电网中,采用下垂控制的微电源,线路阻抗差异、输出电压幅值不等以及微电网复杂结构等因素均会导致微电源输出无功功率不能达到均分的效果,使微电源间出现无功环流。为解决这一问题,提出了一种改进的下垂控制策略。即在传统无功下垂控制中加入线路压降和微电源接入点电压幅值反馈量作为无功下垂控制的补偿量,有效跟踪微电网电压变化,改善输出电压幅值不等的状况。在Matlab/Simlink中搭建微电网仿真模型。仿真结果表明,改善的下垂控制能够大大提高无功均分的分配精度,提高微电网的系统稳定性。 |
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| AbstractList | 微电网中,采用下垂控制的微电源,线路阻抗差异、输出电压幅值不等以及微电网复杂结构等因素均会导致微电源输出无功功率不能达到均分的效果,使微电源间出现无功环流。为解决这一问题,提出了一种改进的下垂控制策略。即在传统无功下垂控制中加入线路压降和微电源接入点电压幅值反馈量作为无功下垂控制的补偿量,有效跟踪微电网电压变化,改善输出电压幅值不等的状况。在Matlab/Simlink中搭建微电网仿真模型。仿真结果表明,改善的下垂控制能够大大提高无功均分的分配精度,提高微电网的系统稳定性。 微电网中，采用下垂控制的微电源，线路阻抗差异、输出电压幅值不等以及微电网复杂结构等因素均会导致微电源输出无功功率不能达到均分的效果，使微电源间出现无功环流。为解决这一问题，提出了一种改进的下垂控制策略。即在传统无功下垂控制中加入线路压降和微电源接入点电压幅值反馈量作为无功下垂控制的补偿量，有效跟踪微电网电压变化，改善输出电压幅值不等的状况。在 Matlab/Simlink 中搭建微电网仿真模型。仿真结果表明，改善的下垂控制能够大大提高无功均分的分配精度，提高微电网的系统稳定性。 |
| Abstract_FL | In the micro-grid, the output reactive power of distributed generations which adopt droop control strategy couldn’t be arranged in average, because of their line impedance differences, the different output voltage amplitude and complex structure of micro grid and other factors. These could lead to reactive circulating current in distributed generations. To solve the problem, this paper proposes an improved droop control strategy. It adds the voltage drop of line, voltage amplitude feedback as an compensation amount of reactive power droop control in the traditional power droop control in order to effectively track the changes of micro-grid voltage and improve the status of the different voltage amplitude. It establishes the micro-grid simulation model in Matlab/Simulink. And the simulation results show that the improved droop control can greatly improve the distribution accuracy of reactive power sharing and enhance the stability of the micro-grid system. |
| Author | 陈丽娟 王致杰 |
| AuthorAffiliation | 上海电机学院,上海201306 |
| AuthorAffiliation_xml | – name: 上海电机学院,上海,201306 |
| Author_FL | CHEN Lijuan WANG Zhijie |
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| Author_xml | – sequence: 1 fullname: 陈丽娟 王致杰 |
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| DocumentTitleAlternate | Research of operation control of micro-grid based on improved droop control |
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| GrantInformation_xml | – fundername: 国家自然科学基金; 上海自然科学基金; 上海市教委创新基金项目(14YZ157，15ZZ106) This work is supported by National Natural Science Foundation of China; Natural Science Foundation of Shanghai; Innovation Fund Project of Shanghai Municipal Education Commission funderid: (11304200); (14ZR1417200，15ZR1417300); (11304200); (14ZR1417200 and 15ZR1417300); (14YZ157 and 15ZZ106) |
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| Keywords | 电压幅值反馈 reactive power sharing 无功环流 voltage drop of line droop control reactive circulating current voltage amplitude feedback 下垂控制 micro-grid 无功均分 微电网 线路压降 |
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| Notes | micro-grid; droop control; reactive circulating current; voltage drop of line; voltage amplitude feedback;reactive power sharing In the micro-grid, the output reactive power of distributed generations which adopt droop control strategy couldn＇t be arranged in average, because of their line impedance differences, the different output voltage amplitude and complex structure of micro grid and other factors. These could lead to reactive circulating current in distributed generations. To solve the problem, this paper proposes an improved droop control strategy. It adds the voltage drop of line, voltage amplitude feedback as an compensation amount of reactive power droop control in the traditional power droop control in order to effectively track the changes of micro-grid voltage and improve the status of the different voltage amplitude. It establishes the micro-grid simulation model in Matlab/Simulink. And the simulation results show that the improved droop control can greatly improve the distribution accuracy of r |
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| PublicationTitle | 电力系统保护与控制 |
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| SubjectTerms | 下垂控制 微电网 无功均分 无功环流 电压幅值反馈 线路压降 |
| Title | 基于改进下垂控制的微电网运行控制研究 |
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